diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 40c5b6747..36aeda5ca 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -6,6 +6,7 @@ Changelog
 
  * Custom document model is now documented (Emily Horsman)
  * Use minified versions of CSS in the admin by adding minification to the front-end tooling (Vincent Audebert, Thibaud Colas)
+ * Wagtailforms serve view now passes `request.FILES`, for use in custom form handlers (LB (Ben Johnston))
  * Fix: "Open Link in New Tab" on a right arrow in page explorer should open page list (Emily Horsman)
  * Fix: Using `order_by_relevance=False` when searching with PostgreSQL now works (Mitchel Cabuloy)
  * Fix: Inline panel first and last sorting arrows correctly hidden in non-default tabs (Matt Westcott)
diff --git a/docs/releases/1.13.rst b/docs/releases/1.13.rst
index c90a58e5e..d3093dbb2 100644
--- a/docs/releases/1.13.rst
+++ b/docs/releases/1.13.rst
@@ -16,6 +16,7 @@ Other features
 
  * :doc:`Custom document model </advanced_topics/documents/custom_document_model>` is now documented (Emily Horsman)
  * Use minified versions of CSS in the admin by adding minification to the front-end tooling (Vincent Audebert, Thibaud Colas)
+ * Wagtailforms serve view now passes ``request.FILES``, for use in custom form handlers (LB (Ben Johnston))
 
 
 Bug fixes
diff --git a/wagtail/wagtailforms/models.py b/wagtail/wagtailforms/models.py
index a22920bc3..9165b131e 100644
--- a/wagtail/wagtailforms/models.py
+++ b/wagtail/wagtailforms/models.py
@@ -237,7 +237,7 @@ class AbstractForm(Page):
 
     def serve(self, request, *args, **kwargs):
         if request.method == 'POST':
-            form = self.get_form(request.POST, page=self, user=request.user)
+            form = self.get_form(request.POST, request.FILES, page=self, user=request.user)
 
             if form.is_valid():
                 self.process_form_submission(form)